摘要:桥梁荷载试验分析系统BLT是一款由交通运输部公路科学研究院开发的用于公路、市政项目中桥梁荷载试验的专业软件。该系统基于参数化建模技术能够方便快捷地建立桥梁结构空间有限元模型，运用OpenGL图形平台技术建立桥梁三维浏览和后处理云图显示平台。BLT系统采用实体单元和空间梁格进行静动载试验分析，简化计算参数实现计算精度和效率的有机结合，紧密结合荷载试验规程自动推荐荷载试验方案和布置试验测点，能够自动进行荷载布置计算，查取测点位置的应力和位移理论计算值，查阅应力和位移云图等，并且最终输出荷载试验方案和荷载试验报告。相对于过去常用软件的荷载试验解决手段，该系统的荷载试验智能化程度高，提高了桥梁荷载试验检测工作效率，是桥梁荷载试验工程们的一款高效辅助工具。本文详细介绍过去常用同类软件存在问题、本系统的技术特点以及实桥应用算例等。

Abstract: Bridge load testing analysis system software BLT was specially used for bridge load testing in Highway or Civic Project, which was developed by Research Institute of Highway Ministry of Transport. It can establish a bridge three-dimensional finite element model, based on parameterized modeling technology, making a three-dimensional model browsing and post-processingcloud picture display platform based on OpenGL graphic technology. BLT system could make the static and dynamic test analysis based on solid element and space beam gird element, simplifying calculation parameters to realize the organic combination of calculate precision and efficiency. It could automatically recommend load testing scheme closely based on regulations and automatically calculate loading arrangement, as well as investigating the theoretical calculations of stress and displacement in the location of the measurement points and consulting the stress and displacement nephogram, and also finally output load test scheme and report.Comparing with solutions of the past software, this system is of high intelligence in Load Testing and improves the efficiency of bridge Load testing, which is a useful auxiliary tool for bridge detection engineers. This paper introduces the problems of past similar software, the characteristics of the system, as well as the real bridge application examples.